Abstract: Fly-ash was predisposed to activize its pozzolanic properties. Through normal test and the single-actor test the best parameters by which to dispose the fly-ash were found, and the properties of predisposed fly-ash cement were examined. These test results show that the fly-ash predisposing method is an effective way to increase the ponolanic activeness of fly-ash, and the predisposed fly-ash cement is an promising product for construction.